摘要
采用接枝、嵌段及交联的方法对聚酯型聚氨酯（PU）阻尼材料进行改性并对其阻尼性能和力学性能进行研究。结果表明，Pu材料的阻尼性能随接枝率增加而明显提高；当接枝率10％时，tanδmax为0．84，tanδ〉0．3的阻尼温域为0．8～61．6℃，拉伸强度19．6MPa，撕裂强度为27．0kN／m，伸长率500％，是综合性能良好的阻尼材料；嵌段可使PU材料的阻尼温域明显向低温移动；交联使PU阻尼材料的tanδmax值由0．78提高到1．19，阻尼温域向低温移动了13．9℃。接枝、嵌段和交联虽然使PU材料的力学性能有所降低，但仍可满足某些对力学性能要求较低的建筑用粘弹性阻尼器和桥梁减（隔）震支座的要求。
Polyester polyurethane（PU） damping materials were modified by grafting, blocking and crosslinking methods. The damping and mechanical properties were studied. The result showed that the damping properties of PU material improved markedly with the grafting increasing. The tanδ was 0.84, the temperature range of tanδ 〉 0. 3 was -0. 8 -61.6℃ , the tensile strength was 19.6 MPa, tear strength was 27.0 kN/m, elongation at break was 500% when the grafting rate was 10%. The damping material comlorebensive performance was well. To the block copolymer of PU material, the damping temperature range moved to low temperature. While crosslinking increased the tanδ of PU damping materials from 0.78 to 1. 19, the damping temperature range moved 13.9 ℃ to low temperature. Grafting, blocking and crosslinking methods could make the PU mechanical properties decreased, but it still was suitable for some demands with low mechanical properties required,such as viscoelastic dampers and bridge reduction isolators.
出处
《聚氨酯工业》
北大核心
2011年第1期21-24,共4页
Polyurethane Industry
关键词
聚酯
聚氨酯
阻尼材料
改性
力学性能
阻尼性能
polyester
polyurethane
damping material
modification
mechanical property
damping property
